EP1693093B1 - Toy vehicle loading arm for pivoting front loading shovel - Google Patents

Description

The invention relates to a loading arm of a toy vehicle with a pivoting loading shovel, comprising a swing-up main rod with a front end provided at first loading blade pivot bearing and provided at its rear end of the first vehicle pivot bearing and a bucket pivoting mechanism.

Such a loading arm is for example from the DE 298 00 336.8 known. The loading arm described therein includes a loading bucket pivot linkage with a pivot lever. The resulting construction of the bucket swing mechanism requires a relatively large amount of space.

The object of the invention is therefore to provide a loading arm of the type described above so that the loading bucket pivot mechanism has a smaller footprint.

1. a) eine hochschwenkbare Hauptstange mit einem an ihrem vorderen Ende vorgesehenen ersten Ladeschaufel-Schwenklager und einem an ihrem hinteren Ende vorgesehenen ersten Fahrzeug-Schwenklager und
2. b) einen Ladeschaufel-Schwenkmechanismus, wobei
3. c) der Ladeschaufel-Schwenkmechanismus ein vorderes, ein mittleres und ein hinteres Schwenkgestänge sowie eine Haltestange mit einem zweiten Fahrzeug-Schwenklager umfasst,
4. d) das vordere Schwenkgestänge ein zweites Ladeschaufel-Schwenklager aufweist,
5. e) das mittlere Schwenkgestänge das vordere und das hintere Schwenkgestänge kettengliedartig verbindet, und
6. f) das hintere Schwenkgestänge jeweils schwenkbar im vorderen Abschnitt der Hauptstange und am vom zweiten Fahrzeug-Schwenklager abgewandten Ende der Haltestange angelenkt ist.

This object is achieved by the features of the independent protection claim 1. The charging arm according to the invention comprises

1. a) a swing-up main rod with a provided at its front end first loading blade pivot bearing and provided at its rear end first vehicle pivot bearing and
2. b) a bucket swing mechanism, wherein
3. c) the bucket pivoting mechanism comprises front, middle and rear pivot links and a support bar with a second vehicle pivot bearing,
4. d) the front pivot linkage has a second loader blade pivot bearing,
5. e) the central pivot linkage connects the front and the rear pivot linkage in a chain link, and
6. f) the rear pivot linkage is pivotally articulated respectively in the front portion of the main rod and the end remote from the second vehicle pivot bearing end of the support rod.

The loading bucket pivoting mechanism of the loading arm according to the invention can be realized with very little space. Thus, the central pivot linkage in the vehicle longitudinal direction is preferably designed to be very short. This dimension is determined essentially only by the space required for the two connecting pivot bearing for connection to the front and the rear pivot linkage. The compact design is also due to the relatively close to the front end of the main rod, in particular in the front third, arranged articulation point of the rear pivot linkage on the main rod conditional. In this way, the bucket pivot mechanism can also be used in a loading arm, which has only a relatively short main rod and therefore is not suitable for the known lever-based pivoting mechanisms. The lever mechanism needs more space.

In addition, the loading bucket pivot mechanism of the loading arm according to the invention gives the impression of a very realistic replica of the original. In particular, in the known lever-based pivoting mechanisms usually quite conspicuous and not present in the original operating handle in the loading arm according to the invention can be integrated very inconspicuously in the loading bucket pivoting mechanism.

In a further embodiment of the invention, it is provided that the front, the middle and the rear pivot linkage is designed in each case as a parallel double linkage with two side cheeks arranged parallel to the vehicle longitudinal axis and with at least one cross brace. This corresponds to the big role model.

Preferably, on one of the cross struts of the front pivot linkage, a latching tab may be provided which engages in an end position of the loading-blade pivoting mechanism on one of the cross braces of the central pivot linkage. As a result, the loading bucket is secured in this end position.

In a further variant, in each case a receptacle is provided on the side cheeks of the front pivot linkage, in which engages a pivot bearing of the connection between the middle and rear pivot linkage in an end position of the loading blade pivot mechanism. This also serves to secure the position. In addition, this results in a very compact design.

In particular, a connecting the recordings and executed as a cross-tie operating handle is still provided on the front pivot linkage. So he fits very well into the appearance of the rest of the bucket-tilting mechanism and practically does not fall on. Due to the mechanical stabilization of the front pivot linkage, it also fulfills a dual function.

Also possible is an embodiment in which a further support rod is provided which is guided in its front portion by means of a guide sleeve arranged on the underside of the main rod.

In particular, the further support rod has a latching projection and the main rod on its underside a latching edge, so that the latching projection for locking the main rod in the raised position releasably engages the latching edge. This will secure the main bar in this position.

Fig. 1

einen Längsschnitt durch ein Spielfahrzeug mit einem erfindungsgemäßen Ladearm in abgesenkter Position,

Fig. 2

einen vergrößerten Ausschnitt von Fig. 1

Fig. 3

eine Draufsicht auf das Spielfahrzeug gemäß Fig. 1,

Fig. 4

einen Längsschnitt durch das Spielfahrzeug gemäß Fig. 1 mit einer anderen Schwenkposition der Ladeschaufel,

Fig. 5

einen vergrößerten Ausschnitt von Fig. 4

Fig. 6

einen Längsschnitt durch das Spielfahrzeug gemäß Fig. 1 mit dem Ladearm in hochgeschwenkter Position und mit der Ladeschaufel in der einen Endposition,

Fig. 7

einen vergrößerten Ausschnitt von Fig. 6

Fig. 8

einen Längsschnitt durch das Spielfahrzeug gemäß Fig. 1 mit dem Ladearm in hochgeschwenkter Position und mit der Ladeschaufel in der anderen Endposition und

Fig. 9

einen vergrößerten Ausschnitt von Fig. 8.

The invention will be explained in more detail with reference to a preferred embodiment in conjunction with the drawings. Showing:

Fig. 1

a longitudinal section through a toy vehicle with a loading arm according to the invention in a lowered position,

Fig. 2

an enlarged section of Fig. 1

Fig. 3

a plan view of the toy vehicle according to Fig. 1 .

Fig. 4

a longitudinal section through the toy vehicle according to Fig. 1 with another pivoting position of the loading shovel,

Fig. 5

an enlarged section of Fig. 4

Fig. 6

a longitudinal section through the toy vehicle according to Fig. 1 with the loading arm in the swung-up position and with the loading shovel in the one end position,

Fig. 7

an enlarged section of Fig. 6

Fig. 8

a longitudinal section through the toy vehicle according to Fig. 1 with the loading arm in the swung-up position and with the loading shovel in the other end position and

Fig. 9

an enlarged section of Fig. 8 ,

In the Fig. 1 to 9 For example, a toy vehicle 1 with a loading arm 2 and a pivoting loading shovel 3 in different positions of the loading arm 2 and the loading shovel 3 is shown. In principle, instead of the loading shovel 3, another element, such as a plow or straw bale fork, may also be provided. In the exemplary embodiment, the toy vehicle 1 is a Gelenkradlader. However, this application is not intended to be limiting for the loading arm 2 according to the invention.

The loading arm 2 comprises a main rod 4, which is connected at its front end by means of a loading blade pivot bearing 5 pivotally connected to the loading shovel 3 and at its rear end by means of a vehicle pivot bearing 6 also pivotally connected to the fuselage of the toy vehicle 1. Above the main rod 4, a bucket swing mechanism 7 is arranged, which includes a front, a middle and a rear pivot linkage 8, 9 and 10 and a support rod 11. The three pivot rods 8, 9 and 10 are each designed as a parallel-double linkage with two parallel to the vehicle longitudinal axis arranged side cheeks 12, 13 and 14 and with cross braces 15, 16 and 17 respectively.

The pivot linkage 8 is pivotally connected at its front end by means of a second loading blade pivot bearing 18 with the loading shovel 3. The loader blade pivot bearing 18 as well as the loading blade pivot bearing 5 and the vehicle pivot bearing 6 in the longitudinal sections of Fig. 2 to 9 hidden and therefore only indicated by dashed lines. The side cheeks 12 of the pivot linkage 8 each contain a receptacle 19, which is formed by a top-formed semi-curved protrusion. These protrusions on the side walls 12 are connected to each other by means of an actuating handle 20, which also acts as a cross brace of the pivot linkage 8 at the same time.

The central pivot linkage 9 connects the front and the rear pivot linkage 8 and 10 in the manner of a chain link, ie in each case pivotable relative to one another.

The pivot linkage 10 is hinged in the front third of the main rod 4 pivotally outside on two side walls of the main rod 4. Adjacent to the pivotal connection with the central pivot link 9, the pivot link 10 includes another pivot point for pivotal connection with the front end of the support rod 11. At its other end, the support rod 11 is pivotally connected by means of a vehicle pivot bearing 21 to the fuselage of the toy vehicle 1.

In addition to the above and largely parallel to the main rod 4 extending support rod 11, a further support rod 22 is disposed below the main rod 4. The main rod 4 has on its underside a guide sleeve 23, through which the support rod 22 is loosely inserted therethrough, so that there is a movable guidance of the support rod 22 in its front portion. At its rear end, the support rod 22 is pivotally connected by means of a third vehicle pivot bearing 24 with the fuselage of the toy vehicle 1. At one of the bottom of the Main rod 4 facing side of the support rod 22, a locking projection 25 is formed. As a counterpart, a latching edge 26 is provided on the underside of the main rod 4. The latching projection 25 engages in the swung-up position of the loading arm 2 releasably behind the locking edge 26 and thus secures this position of the loading arm 2 (see detail view according to FIG Fig. 9 ).

The operation of the bucket swing mechanism 7 will be described below.

The support rod 11 causes a raising or lowering of the rear pivot linkage 10 depending on the pivot position of the loading arm 2. The pivot linkage 10 is thus kept at a given pivot position of the loading arm 2 in a fixed position, which is in particular independent of the current pivot position of the bucket 3.

For pivoting the loading blade 3, however, the other two pivot rods 8 and 9 are provided. The bucket swing mechanism 7 in this regard is designed so that there are two stable swing end positions of the bucket 3, in which the bucket swing mechanism 7 moves automatically after exceeding one dead point caused by the child playing.

The first pivot end position for emptying the bucket 3 is in FIG Fig. 6 and 7 shown. In this position, the pivotal connection between the front pivot linkage 8 and the central pivot linkage 9 is viewed in the direction of the vehicle longitudinal axis in front of - at a given swivel position of the loading arm 2 locally stable - pivotal connection between the central pivot linkage 9 and the rear pivot linkage 10th

By means of a corresponding operation on the operating handle 20 by the child playing the loading bucket 3 can be converted into the other pivoting end position in the Fig. 4 . 5 . 8th and 9 is reproduced. In this case, the pivotal connection between the front pivot linkage 8 and the central pivot linkage 9 is viewed in the direction of the longitudinal axis of the toy vehicle 1 behind the pivotal connection between the central pivot linkage 9 and the rear pivot linkage 10. In this Schwenkendposition the pivotal connection between the middle and the rear pivot linkage engages 9 and 10 in the recordings 19 a. In addition, a provided on one of the cross braces 15 locking tab 27 engages the cross bar 16, which connects the side cheeks 13 at the height of this pivotal connection. In Fig. 9 is the locked position shown in Fig. 5 however, a position just before snapping. The latching tab 27 additionally secures this pivoting end position of the loading shovel 3. This is particularly advantageous when the loading bucket 3 is loaded.

The loading arm 2 and in particular also the support rod 22 are made of plastic. This results in a beneficial inherent elasticity. This requires that the support rod 22 bends back a little while pivoting the loading arm 2 down when the locking projection 25 is moved with its bevelled edge on the locking edge 26 along. After completely exceeding the locking edge 26, the holding rod 22 snaps back resiliently and the locking projection 25 comes to lie behind the locking edge 26, whereby the position assurance is achieved. Due to the plastic used, the position assurance can therefore be implemented particularly easily and efficiently. For a different choice of material, such as a metal material, would be due to the poorer inherent elasticity however, a more elaborate security mechanism is required.

Overall, the bucket pivoting mechanism 7 has a very compact construction. In addition, the charging arm 2 realized in this way is very similar to the model of the original vehicle and nevertheless offers child-friendly handling.

Claims (7)

1. Loading arm of a toy vehicle (1) with a pivotal loading shovel (3) comprising

   a) an upwardly pivotal main rod (4) with a first loading shovel pivot bearing (5) provided on its leading end and a first vehicle pivot bearing (6) provided on its trailing end and

   b) a loading shovel pivot mechanism (7),
   characterised in that

   c) the loading shovel pivot mechanism (7) has a front, middle and rear pivot linkage (8, 9, 10) as well as a holding rod (11) with a second vehicle pivot bearing (21),

   d) the front pivot linkage (8) has a second loading shovel pivot bearing (18)

   e) the middle pivot linkage (9) connects the front and the rear pivot linkage (8, 10) in the manner of a chain link, and

   f) the rear pivot linkage (10) is respectively linked in the front portion of the main rod (4) and on the end of the holding rod (11) remote from the second vehicle pivot bearing (21).
2. Loading arm according to claim 1, characterised in that the front, middle and rear pivot linkages (8, 9, 10) are each configured as a parallel double linkage with two side cheeks (12, 13, 14) positioned parallel to the longitudinal axis of the vehicle and with at least one cross strut (15, 16, 17).
3. Loading arm according to claim 2, characterised in that provided on one of the cross struts (15) of the front pivot linkage (8) is a latching cover plate (27) which engages on one of the cross struts (16) of the middle pivot linkage (9) in an end position of the loading shovel pivot mechanism (7).
4. Loading arm according to claim 2, characterised in that provided on the side cheeks (12) of the front pivot linkage (8) is a respective mount (19) into which a pivot bearing of the connection between the middle and rear pivot linkage (9, 10) engages in an end position of the loading shovel pivot mechanism (7).
5. Loading arm according to claim 4, characterised in that an actuating handle (20) configured as a cross strut and connecting the mounts (19) is provided on the front pivot linkage (8).
6. Loading arm according to claim 1, characterised in that a further holding rod (22) is provided, the front portion of which is guided by a guide sleeve (23) positioned on the lower side of the main rod (4).
7. Loading arm according to claim 6, characterised in that the other holding rod (22) has a catching projection (25) and the lower side of the main rod (4) has a catching edge (26) so that the catching projection (25) engages detachably on the catching edge (26) to lock the main rod (4) in the upwardly pivoted position.

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